I want to create a SLIT between base and topper, the slit size will vary
from 2-3 '' or 4-8"Length X 1/8th to 1/4" depth into the fused item. The rest I hope would fuse together except my Slit area.
Has anyone done this, if so what did you use to keep it from closing up?
Or does anyone have any suggestions on how to proceed with my idea?
I've used fiber paper, fiber board, and kiln furniture wrapped in paper to create voids. You'll always have some edge irregularity, but with any of my projects it's been acceptable.